John Otis reports on controversial plans for a massive mine in the Colombian Andes. The proposal marks a stark shift for a region long beset by violence and neglect. But the promised jobs and come with fear of water pollution and environmental damage.

John Otis reports on controversial plans for a massive mine in the Colombian Andes. The proposal marks a stark shift for a region long beset by violence and neglect. But the promised jobs and come with fear of water pollution and environmental damage.

John Otis reports on controversial plans for a massive mine in the Colombian Andes. The proposal marks a stark shift for a region long beset by violence and neglect. But the promised jobs and come with fear of water pollution and environmental damage.